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Unlike homes with basements or crawl spaces, a slab floor is solid concrete with no structural wood flooring system. For homes with this type of floor, soft soil or bad compaction is almost always the culprit. Once the soil is compromised, the slab will shift, and this creates the sagging or sinking effect. Pressure from that shift will sometimes crack the slab itself, causing high and low places in the flooring. To fix this type of damage, you need concrete slab repairs.
Water is a probable suspect, as it seeps into the ground around your foundation. The sill plate, wood beams, and floor joists are all vulnerable to this; these wooden components on top of your foundation are the wood framing system that supports your floor. Because it has direct contact with the concrete and can be over the exposed soil line, it often falls victim to water intrusion. Once water intrudes and saturates the wood, this leads to deterioration. It’s this deterioration that causes the floor system to fail.

But you don’t have to have standing water under your house to cause structural decay. High humidity can also damage the beams and joists that hold up your subfloor. Wood is highly porous and readily absorbs water from the air. Over time, this water saturation softens and rots the boards. As they decay, they compress under the weight of your home, lowering your floor sometimes by several inches.

Lack of building codes- or outdated ones- are another concern. A main support beam, the post that spans the length of your home, should be sized proportionately and supported every few feet. In many homes, the beams may not be the correct size or the support posts are installed too far apart. This over-spanning puts greater stress on the beam and makes it more likely to sag and potentially even fail.
Along the same lines, if your home is more than 50 years old, it’s also possible that inadequate materials are to blame. When a home is built, sometimes the beams or joists are not the correct dimensions. When this happens, a contractor will install a shim; a shim is a thin piece that adds a minimal lift to ‘even out’ the installation. Many times in construction, that shim was usually another piece of wood; at Acculevel we use steel shims to prevent compression or rot. These shims also allow us to increase the overall surface of the bearing load, so that the beam it’s supporting is not crushed by the weight of your home.
Technology is another age-related factor. New solutions and materials are always in development, but they take time to become commonplace. Before the 1970s, pretreated or pressure-treated lumber was not widely available or regularly used by builders. Lumber installed in its original ‘raw’ form is more vulnerable to insects and water damage.
New trends in home design can have a negative effect if a remodel doesn’t take the weight of the raw materials into account. Many older homes aren’t built to carry the load of solid granite countertops or stone-tiled floors and walls. Recreational items like a pool table or hot tub will also add significant weight to your floor system. These are all items that can put additional stress onto an already failing wood structure.
Contact Acculevel! We provide free estimates on sagging floor repairs.
Completed an egress window installation for Charles in zip code 41051 to provide a safe and accessible exit from the basement. The project involved cutting through the poured concrete and fitting a well-sealed window unit, improving both safety and natural light. The service was priced at around $4,400.
Near Independence, KY
Completed a stabilization project for Martin’s porch in zip code 41051. We laid the groundwork for future stability with plans to install piers, preventing any potential settlement issues. The sidewalk was leveled to ensure no future complications. This proactive approach was implemented smoothly for approximately $2000.
Near Independence, KY
Our team conducted a comprehensive repair on Jeffrey's tri-level home with a focus on foundation and drainage issues in zip code 41051. We addressed an exterior crack from the window to the foundation and tackled horizontal drywall cracks at various locations. The repair also included drainage improvements to ensure long-term stability. This essential work was approximately priced at $31.9K.
Near Independence, KY
Raised the driveway slab where it meets the garage, addressing a height difference. Also installed a drainage solution to enhance water management around the property in ZIP code 41051. This comprehensive project, approximately costing $4,200, ensures a smooth transition between surfaces and better water diversion.
Near Independence, KY
Completed slabjacking to lift and level the driveway and walkway. The work ensures a smooth and even surface, addressing previous unevenness. This project was executed for approximately $3,359 in zip code 41051 for Matt.
Near Independence, KY


